This undated photo provided by the Ford Motor Co. shows the 1948 Lincoln Continental Cabriolet V12. Thirteen years after the last Continental rolled off a Michigan assembly line, Ford Motor Co. is debuting the new Continental in concept form at the New York Auto Show on Monday, March 30, 2015.The production version goes on sale next year. (Photo by AP Photo/Ford Motor Co.)

In this June 14, 1961 file photo, U.S. Secret Service agents stand on retractable stands on President John F. Kennedy's new plastic-topped Lincoln Continental limousine outside the White House, after its delivery in Washington. The car has three roof combinations, a rear seat that can be raised and lowered, retractable foot stands for Secret Service men, two two-way radio telephones, and a master control panel for power accessories. (Photo by Henry Burroughs/AP Photo)

This undated photo provided by the Ford Motor Co. shows the 1997 Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1979 Lincoln Continental Mark V. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1941 Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1957 Lincoln Continental Mk II. (Photo by AP Photo/Ford Motor Co.)

In this June 1946 file photo, Henry Ford II, grandson of Ford Motor Co. founder Henry Ford, is seated in a Ford Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1941 Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)

This June 1961 photo provided by the Ford Motor Co. shows President. John F. Kennedy's Lincoln Continental limousine. The limo was the first presidential car equipped with a transparent roof for all compartments and has other options including fabric roof covering, or use as a convertible, as well as combinations for the rear, middle and front compartments. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1972 Lincoln Continental Mark IV. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1962 Lincoln Continental convertible. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1961 Lincoln Continental convertible. (Photo by AP Photo/Ford Motor Co.)

This undated photo provided by the Ford Motor Co. shows the 1992 Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)

A Lincoln Continental concept car is shown at the New York International Auto Show, Monday, March 30, 2015, in New York. (Photo by Mark Lennihan/AP Photo)

This undated photo provided by the Ford Motor Co. shows the 2000 Lincoln Continental. (Photo by AP Photo/Ford Motor Co.)